Vehicle-tire.



A. AEBLI.

VEHICLE TIRE. APPLICATION FILED 001'. e, 1969.

I 1,033,513. Patenteq July 23,1912:

ANTQN AEBLI, OF MILWAUKEE, WISCONSIN.

VEHICLE-TIRE.

Specification or Letters patent- Patented July 23, 1912.

Application nieaoa'ober e, 1909. Serial No. 521,319.

'To all whom it may concern:

Be it known that I, ANTON AEBLI, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented a new and useful Vehicle-Tire, of which thefollowing is a specification.

My invent-ion relates to improvements in vehicle tires.

The object of my invention is to provide a form of tire which will notcollapse when punctured, although it may, if desired, contain aninflated pneumatic tube. Also to provide a form of tire in which theinflated portion will be protected by an outer portion having a cavityof larger transverse diameter than that of the inflated cavity, thewalls of the larger cavity being supported by a resilientnon-collapsible member.

In the following description reference is bad to the accompanyingdrawings, in .which Figure l is a side elevation of my improved tire,partially broken away to show the interior construction. Fig. 2 is across sectional view of the same. Fig. 3 is a cross sectional viewshowing a modified form of construction.

Like parts are identified by the same reference characters throughoutthe several views.

The casing A of my improved tire is formed of rubbcr,,or layers ofrubber and canvas, or any other suitable flexible material.- The spacewithin this casing is subdivided by a wall 13 into two concentricannular cavities C and D respectively. The inner cavity I) may be filledwith com 'ressed air. A flexible tube ,E is prefera ly inserted in thecavity I) and inflated in the usual manner, but this is not essential.The outer cavity is filled with a resilient noncolla sible member, suchas the spirally coile spring F shown in Fig. 2, this (3011 having tileform of a progressive spiral, with the successive turns in closeproximity to each other.

If desired, the inner wall of this coil may be buckled inwardly, formingan annular channel f along the inner wall of the coil, which channel isconcave in cross section as shown in Fig. 3. In such cases the partitionwall B should be convex on the side againstwhich the concave portion ofthe spring seats, thus conforming to the shape of this portion of thespring.

;of the partition B, the tire being thus made to assume in crosssection, the shape of a; 1

figure 8.

In constructing my improved tire, the

coiled spring is inserted in the mold, and.

embedded in the rubber of the casing and partition wall in the processof casting the tire.

It will be observed that the outer cavity C has a greater transversediameter than the inner cavity E and this is true, not only of theconstruction illustrated in Fig. 2, but also of the constructionillustrated in Fig. 3. It therefore follows that in case the tirebecomes punctured into the inner cavity D, the escape of air from thelatter will not permit the outer portion of the tire to settle into it,since the coiled spring will be supported by the walls of the tire onthe respective sides of the cavity D.

In order to prevent the outer portion of the tire from settling into theinner cavity D, it is, of course, necessary that the walls of the outercavity be supported so that they cannot collapse. For this reason it isn0!- practical to depend upon pneumatic pressure to sustain the walls ofthe outer cavity, since such walls would necessarily be punctured firstand the escape of air from the outer cavity would immediately render thetire useless whether the inner cavity were punctured or not, but bymaking the outer cavity larger than the inner one and so porting itswalls so that they cannot odilapse under any circumstances, I am able tosecure the benefit of a neumatic cushion when the inner tube is in ated,and can still use the tire as a sprihg cushion tire in case I claim asnew and desire to secure by Let- A ters Patent, is

1. A vehicle tire comprising a flexible sheath having its interiorportion subdl;--

vided by similar material into two concentric annular cavities, theinner cavity beingadapted to receive airunder ressure, an

the outer cavity having a resi ient non-collapsible member supportingthe tread surface of said flexible sheath, said member comprising ametallic spring wound in the form of a progressive spiral coil fillingthe outer cavity, and having a greater transverse diameter than thetransverse diameter of the inner cavity.

2. A vehicle tire comprising a flexible sheath, having its interiorportion subdivided by similar material into two concentricannular'cavities, the inner cavity being ada ted to receive air underressure, and the pater cavity having a resi ient non-collapslble member$11 portin the tread surface of said fiexibie sheati,

I form of id member comprising a metallic spring Wound in the aprogressive spiral coil filling the 15 outer cavity, the inner side ofsaid spiral coil being buckled inwardly in concave bends, said coilhaving a greater transverse diameter than that of the inner cavity.

In testimony whereof I affix my signa- 0 ture in the presence of twowitnesses.

ANTON AEBLI.

Witnesses MARY 'COLLINGE, DoM. R. FRYMARK.

